Pressure Dependence of Time-Resolved Photoluminescence in Ordered Ga_{0. 5}In_{0. 5}P

抄録

We have measured the time-resolved photoluminescence (TRPL) spectra of ordered Ga_{0. 5}In_{0. 5}P alloys at 12 K and for pressures up to ∼4 GPa. At lower pressures below ∼2 GPa, the PL spectra are found to consist of three emission bands whose decay profiles are quite different from each other. Above 3 GPa the PL spectra shows fast decays, which do not depend on the detection energy. We propose a model of type-II band alignment to explain the PL behavior observe at high pressures.